This is awful....

EDIT: I bought a PLCC 68010 from the same seller years ago and it was a non functional part

Yeah really.. i`m pissed off

Not good.

Talking about this seller. I bought a bunch of SRAM chips from them about three times and every time there is at least 30% defect rate. Can't complain as it is still good deal IMHO, just need to order more that I actually need.

That sucks. I assume You have been fully refunded? Hopefully Ebay deals with a seller that is obviously selling fake goods.

I recently purchased what was supposed to be AY-3-8912 from Aliexpress and it was a fake, had less pins that an original chip.
I got a full refund.
https://www.aliexpress.com/item/33005709179.h … rchweb201603_53

Wow. I wonder when the counterfeiting occurred (recent or 25+years ago?). 287 chips seem like a pretty low volume, low cost item to be worth the effort. Maybe the seller was fooled as well.

BinaryDemon wrote on 2020-01-18, 13:23:

Wow. I wonder when the counterfeiting occurred (recent or 25+years ago?). 287 chips seem like a pretty low volume, low cost item to be worth the effort. Maybe the seller was fooled as well.

Indeed. Can't imagine it's even worth the paint job to fake these...

OP, did you contact seller and/or eBay? What was the response?

Yeah already contacted, the Seller has Original FPU as Picture but sells this variant.

I don't think he is serious, otherwise he would have the right picture for the IC.

Maybe the seller was fooled as well.

Unlikely if it is true that many of the other stuff he sells or sold is fake as well. Also, labor in China is worth nothing and if you sell in masses, even a few cent of profit/piece will build up.

I've bought a 80287-10 from this seller almost 2 years ago. Plopped it in a 286 motherboard and the system configuration table reported "Numeric Processor: Present", didn't do more testing at the time. I guess I'll have to do it these days 😀
How did you expose the relabeling? Some solvent or just by scratching the paint.
As a side note, all the EPROMs I got from China are fakes, but most of them are working.

I am not going to buy it, but I would be curious:

One of the only chances to buy 32pin 128kx8 cache rams is
https://www.ebay.at/itm/10pcs-IS61C1024-10N-I … 9gAAOSwBnZbGjJJ

It's huayi-components, too

Isnt the ISSI Painting white ?

i have different kind of ISSI chips and none look like that..

Yeah, and I am not even sure, if 10ns exist, 15ns or 20ns would be normal.
But maybe the 10ns stands for 100ns. 😁

Somebody here, that bought that article?
Actually it seems popular to upgrade 486 mainboards to 1MB cache (if possible)

Yeah 2 to 5% Performance increase is really worth it 😁

Also the Datecode seems wrong.. 2015 ? really?

10ns sram does exist according to datasheets of other types ^^
the fastest I have is 12ns, and the datasheet for IS61C1024 also states 12ns as the fastest variant so I'd assume they're fake.

I bought them. See above. 30% of chips didn't work. They have correct capacity, but definitely not -10ns.

Testing in my AMD 5x86 133 @ 150/160 MHz they need even slower timings than genuine -15ns chips.

Yeah, maybe they are 20ns. Given about 70% work and slower speed, still a good deal because of the price.

What about this seller for the 10ns cache chips?
[link removed]

This seller sells them for a lot more, and they are marked 15ns instead.... maybe genuine?
[link removed]

Who really knows for sure. They could be old stock that was never sold or originally failed testing.

Obvious remarking of the FPUs is just dumb.

^--the first is a brand new seller out of China (well, at least a new Ebay account). It looks like it is a variant of multiple accounts or multiple previous accounts due to negative feedback, hence the -8 appended to their username. Lots of Chinese resellers do this. They'll close their old account and make a new one with the same user name and a -2, -3, -4, etc.

2nd one is an experienced seller, so read all negative feedback. They try to get negative feedback removed, so take all negative feedback seriously.

I usually still purchase from some sellers like that and just gamble that I'll get something that works if it absolutely cannot be found elsewhere. Then when it doesn't work, I leave negative feedback stating that the product is counterfeit if I can prove it which is usually pretty easy -- they'll refund you almost immediately.

I see a lot of those fake 287s on Taobao. Most of them seem to be 8088s. Some of them they don't even hide the old writing on the IC. I've seen ones that have both P8088 and D80287 printed on the surface.
This even even limited to intels. There are fake Cyrix 82S87 Fasmath chips out there too sold in a suspicious plastic package. Perhaps there are some legit PDIP versions of this chip, but every one I've seen is CDIP.